Updating Hernandez investigation

Surveillance video from the North Attleborough, Mass., neighborhood of Aaron Hernandez shows the New England Patriots tight end with Odin Lloyd and two other people hours before Lloyd was killed earlier this week, sources confirmed to ABC News late Thursday.

In addition, the Boston Globe reported that video images appear to show Hernandez and Lloyd together on Fayston Street in Boston early Monday morning.

Hernandez, 23, has been at the center of the investigation since the body of Lloyd, a 27-year-old semi-pro football player, was found shot in the back of the head Monday in an industrial park near Hernandez's home in North Attleborough.

Hernandez has not been ruled out as a suspect in the murder, law enforcement sources told ABC News earlier Thursday.